Proteomics

Dataset Information

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C18 nanoLC-MS and Glycogenomics to Facilitate O-Glycan profiling in Human Cells


ABSTRACT: O-glycosylation is an abundant modification throughout the human proteome and plays a role in, amongst others, regulation of protein cleavage, protein folding, and modulation of cell-cell and -matrix interactions. O-glycosylation type and structure are important for biological function, demanding analytical methodologies that facilitate the annotation of O-glycans in biological material. While various successful strategies for the in-depth profiling of released O-glycans have been reported, these methods are often limitedly accessible to the non-specialist and/or challenged by the high abundance of O-glycan structural isomers. Here, we developed a high-throughput sample preparation approach for the non-reductive release of O-glycans from human cell material. Reducing-end labeling allowed efficient isomer separation and detection using C18 nano-liquid chromatography coupled to Orbitrap mass spectrometry (nanoLC-MS/MS). The implementation of glycogenetically engineered cell material proved a way into the complex structural annotation of O-glycan types and isomers. Using human keratinocytes as model system, we found a wide variety of O-glycan structures, including O-fucose, O-glucose, O-GlcNAc and O-GalNAc glycosylation, with the latter carrying both elongate Core 1 and Core 2 structures and varying numbers of fucoses and sialic acids. The method, including the now well characterized standards, provide the opportunity to study glycomic changes in human tissue and disease models using rather mainstream analytical equipment.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Keratinocyte, Skin, Kidney

SUBMITTER: Noortje de Haan  

LAB HEAD: Hans Wandall

PROVIDER: PXD029644 | Pride | 2022-04-04

REPOSITORIES: Pride

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Publications

In-Depth Profiling of <i>O</i>-Glycan Isomers in Human Cells Using C18 Nanoliquid Chromatography-Mass Spectrometry and Glycogenomics.

de Haan Noortje N   Narimatsu Yoshiki Y   Koed Møller Aasted Mikkel M   Larsen Ida S B ISB   Marinova Irina N IN   Dabelsteen Sally S   Vakhrushev Sergey Y SY   Wandall Hans H HH  

Analytical chemistry 20220304 10


<i>O</i>-Glycosylation is an omnipresent modification of the human proteome affecting many cellular functions, including protein cleavage, protein folding, and cellular signaling, interactions, and trafficking. The functions are governed by differentially regulated <i>O</i>-glycan types and terminal structures. It is therefore essential to develop analytical methods that facilitate the annotation of <i>O</i>-glycans in biological material. While various successful strategies for the in-depth pro  ...[more]

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